Question

Matematyka z plusem 1 ... zad30/165

WYKONAJ DZIAŁANIA.

a)6(x-4)-2

b)2(x+1)-3(x-1)

c)-3(y-2)+4(y+2)

d)5(x-y-1)-4(x+2)

e)2(3a+b)-2(a-b)

f)1/2(4x-4)-2x

g)x(x-1)-3(x2-x)

h)5a(a-3)-3a(a-5)

i)3x(x+1/2y)-2y(1/2x-1/2)

Daje naj :)

Answer 1

a) 6(x-4)-2=6x-24-2=6x-26

b) 2(x+1)-3(x-1)=2x+2-3x-3=-x+5

c) -3(y-2)+4(y+2)=-3y+6+4y+8=y+14

d) 5(x-y-1)-4(x+2)=5x-5y-5-4x-8=-x-5y-5

e) 2(3a+b)-2(a-b)=6a+2b-2a+2b=4a+4b

f) 1/2(4x-4)-2x=2x-2-2x=-2

g) x(x-1)-3(x2-x)=x²-1x-3x²-3x=-2x²-4x

h)5a(a-3)-3a(a-5)=5a²-15a-3a²-15a=2a²

i)3x(x+1/2y)-2y(1/2x-1/2)=3x²+xy-xy-y=3x²+y

 

liczę na naj ;d